gistfile1.txt

<?php
 
class car {
    // class-level variables storing classes; Type-hinted
    protected $Frame;
    protected $Paint;
    protected $Tires;
    
    // class-level variables; not Type-hinted
    protected $paintColor = 'red'; // class-level variable storing a scalar
    protected $level;
    protected $bubble;
    
    // Type-hinted arguments are studly cased and not type-hinted are camel cased
    public function __construct(Frame $Frame, Paint $Paint, Tires $Tires, $level = Logger::DEBUG, $bubble = true) {
        $this->Frame = $Frame;
        $this->Paint = $Paint;
        $this->Tires = $Tires;
        
        // Not type-hinted
        $this->level = $level;
        $this->bubble = $bubble;
    }
    
    // Assembler is type-hinted and message is not
    public function assembleCar(Assembler $Assembler, $message) {
        $Assembler->add($this->Frame);
        $Assembler->add($this->Paint, $this->paintColor);
        $Assembler->add($this->Tires);
        
        // Not type-hinted
        echo $message;
    }
}